Munin always rendering straight line
I've created a simple Munin plugin that returns one integer value in range
from 0 to 20000, and I've got this green line with value 500 present on
every graph, even if there is no data for graph present.
Plugin config section:
graph_title R: folder age in seconds
graph_category prkno
graph_info This graph shows age of folders
graph_args --upper-limit 20000 -l 0
graph_vlabel seconds
drive_r.label R:
Munin output if zoomed to period without data:
Munin output with data present:
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